-v on 3rd example too

Change the actual default delim for merge (it's ";" not ",")

ENH: shuffle intervals to non-overlapping locations.

Update merge.rst

Fixed sort command syntax on line 18

Update advanced-usage.rst

Update coverage.rst

Update sort.rst

The UNIX sort command was not correct.
I fixed it so that the numerical sort was only applied to the second column.

Update coverage.rst

The header for the -d option says '-hist', I edited the heading to say '-d' instead.

removed duplicate description of -s option

add n_intersections to jaccard output

Minor build infrastructure patches

Because $(SOURCES) contains non-.cpp files, object files were being
built twice, once as .o and once (somewhat by luck!) as .h.